[RFC PATCH] drm/amd/display: dont ignore alpha property

[Melissa Wen]

On 03/28, Simon Ser wrote:
> Thanks a lot for you patch! I've noticed as well that amdgpu ignores
> the plane alpha property [1]. I'll try to find time to test it.
Hi Simon,

So you've faced this kind of issue many times :/
Let me know the results from your side, so we can use it to find the
correct approach to solve this issue.
> 
> [1]: https://gitlab.freedesktop.org/drm/amd/-/issues/1734
Yeah, it looks like the same problem.

I also think the IGT test case (alpha-7efc) is not the best one because
results can be affected by rounding issues. Maybe the test should be
reworked, but first this alpha property issue should be clarified.

Thanks for the inputs!

Melissa
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